Shackle joint



Feb. 12, 1935. I H. c. LORD v 1, 4

7 SHACKLE JOINT Fi led March 28 1929 INVENT Y /p I 3 AZ 6 f 'fi ew Patented Feb. 12, 1935 I I I I UNITED STATES PATENT OFFICE smift iim Appiicatioiiargfis, (Iii-2:11:31. 350,699

The present invention is particularly designed pin 5, the rubber being preferably secured to for shackle joints in which there is a variation of the pin and shell by surface bonding.

turning movement as in a spring suspension for A spring 6 has a spring eye '1 in which there an automobile and particularly with relation to is a joint spool having an outer shell 8, a rubber rubber joints for such suspension.- Rubber bushing 9, and a central pin 10. The central 5.

joints taking up the turning movement through pin 10 is elongated and rubber bushings 11 are the distortionof the rubber have limitations as arranged on the ends of the pin 10 and-shells to the extent of movement and also the wear -12 are arranged on the bushings 11. The rubber on the rubber due to the distortion is very bushings 9 and 11 are preferably secured to the 1o much increased as the distortion is increased. I pin and shells bysurface bonding. 10 havev found that in the compression type of Shackle links 13 are formed in halves, each shackle joint the turning movement of the half having grooves 14 for receiving the pin 5 spring eye is very much more than that of the and grooves 15 for receiving the shells 12. turning movement of the joint in the bracket. Clamping bolts 16 extend through the upper 1Q In ordinary installations it is approximately ends of the links. These bolts extend into 15 double. It is, therefore, desirable to make the grooves 17 in extensions of the pin 5. Thus the rubber joint of the spring eye of greater fiexibolts 16 not only clamp the links on the pin bility, or capacity for turning than the joint in but also key, or lock the pin against possible the bracket and in giving it this greater flexiend movement through the engagement of the 20 bility it gives to the joint as againstside-sway bolts with the walls of the grooves 17. 20 I I less rigidity. As a result, therefore, in some Clamping bolts 18 extend through the lower types of shackle joints it has been desirable, in ends of the links, clamping the lower ends of fact almost necessary, to supply a cross brace the links on the shells 12. It will be observed member between the shackles to prevent the that the lower ends of the links are oil-set from sidesway of the shackles in the joints. the center with extending sleeves 19. This per- 26 In carrying out my invention I use what might mits of having the upper ends of the links as be termed a single joint in the bracket with a close to the bracket as practical and at the same pin for its central member extending beyond the time entirely supporting the shell of the lower joint proper and secure the shackles rigidly to joints. If desired, the links may be reversed so 80 this extending pin. Thus there is formed a far as the extension 19 is concerned and in this 30 rigid metallic U for the shackle which assures ease the upper joint may be made longer, thus rigidity as between the opposing shackle links. interposing a longer rubber bushing'in this joint This leaves the structure free to provide a more and giving greater rigidity to the shackle joints flexible rubber joint for the spring eye without as a whole as against any cocking strain.

losing the rigidity of the shackle structure as a It will be observed that with the structure, 35 whole. Another feature of the invention is the the pin 5 being rigid with the links 13 forms a forming of the shackle links in halves, clamprigid metallic U structure for the shackle as a ing these halves together to secure them on the whole and it is, therefore, unnecessary to projoints. With the links thus formed it is possible vide a separate bracing means between the links.

40 to readily machine them, or t form t parts The single joint at the top also has less flexibility 40 by coining, if desired. Features and details of as against evoking, 0r angling mq t than the invention will appear from the specification a double m such F 15 w m h wring and claims 1 eye, or a oint having sufiicient flexibility to A preferred embodiment of the invention is take the larger movement of the spring It will be noted that the joint in the spring eye 45 2 3mg??? m the accompanymg drawmg as is subjected to the same turning movement as i that in the bracket so far' as the swinging of 1 shows slde #levatmn of the shackle the links themselves is concerned. In addition stmcturek I to the turning movement incident to thesvling- 2 a sectlon the me ''T 1 ing of the links the joint in the springeye also 50 3 an end Vlew of modlficatlonsustains the turning movement incident to the 1 marks frame bracket. has a! down..swinging of the pring eye and in a tu l Opening 2 and arranged in t Joint Opening is practice this is approximately as great a turn- M a Join comp an outer. Shell 3 p sed intp ing movement as the turning movement incithe opening 2, a rubber bushing 4, and a central dent to the swinging of the link. By using, 55

} rubber joint in the smaller movement member comprising a rubber bushing in the opening and a central pin, a rubber joint in the greater movement member comprising a rubber bushing in the opening; an elongated pin in the bushing; a rubber bushing on each end of the elongated pin; and shackle links rigidly attached to the central pin and the rubber bushings on the elongated pin. I

2. In a shackle joint, the combination of a frame bracket having a joint opening therein; a spring having a spring eye thereon; a rubber joint in the bracket opening comprising a rubber bushing in the opening and a central pin; a rubber joint in the spring eye comprising a bushing in the spring eye; an elongated pin in the bushing; rubber bushings at the ends of the elongated pin; and shackles between the end bushings on the elongated pin and rigidly connected with the pin of the joint in the bracket.

3. In a shackle joint, the combination of two jointmembers, each having a joint opening therein, one of the members having a greater relative turning movement than the other; rubber joints in the smaller movement member comprising a rubber bushing in the opening and a central pin; a rubber joint in the greater movement member comprising a rubber bushing in the opening; an elongated pin in the bushing; a rubber bushing on each end of the elongated pin;" and shackle links rigidly attached to the central pin and the rubber bushings on the elongated pin, said rubber bushings being locked to sustain through the distortion of the rubber the normal turning movement of the joints. I

4. In a shackle joint, the combination of two joint members, each having a joint opening therein, one of the members having a greater relative turning movement than the other; rubber joints in the smaller movement member comprising a rubber bushing in the'opening and a central pin; a rubber joint in the greater movement member comprising a rubber bushing in'the opening; an elongated pin in the bushing; a rubber bushing on each end of the elongated pin; and shackle links rigidly attached to the central pin and the rubber bushings on the elongated pin, said rubber bushings being locked by surface bonding to sustain through the distortion of the rubber the normal turning movement of the joints.

5. In a shackle joint, the combination of a frame bracket having a joint opening therein; a spring having a spring eye thereon; a rubber joint in the bracket opening comprising a rubber bushing in the opening and a central pin; a rubber joint in the spring eye comprising a bushing in the spring eye; an elongated pin in the bushing; rubber bushings at the ends of the elongated pin; and shackles between the end bushings on the elongated pin and rigidly connected with the pin of the joint in the bracket,

the rubber bushings in the bracket spring eye being locked with the walls thereof and the pin and the rubber bushings on the ends of the elongated pin being locked with the pin and the shackle to sustain through the distortion of the rubber the normal turning movement of the joints.

6. In a shackle joint, the combination of a frame bracket having a joint opening therein; a spring having a spring eye thereon; a rubber joint in the bracket opening comprising a rubber bushing in the opening and a central pin; a rubber joint in the spring eye comprising a bushing in the spring eye; an elongated pin in the bushing; rubber bushings at the ends of the elongated pin; and shackles between the end bushings on the elongated pin and rigidly connected with the pin of the joint in the bracket, the rubber bushings in the bracket spring eye being locked by surface bonding with the walls thereof and the pin and the rubber bushings on the ends of the elongated pin being lockedby surface bonding with the pin and the shackle to sustain through the distortion of the rubber the normal turning movement of the joints.

7. In a shackle joint, the combination of two joint members, each having a joint opening therein, one of the members having a greater relative turning movement than the other; a rubber joint in the smaller movement member comprising a rubber bushing in the opening and a central pin; a rubber joint in the greater -the central bushing of the joint in the greater movement member.

8. In a shackle joint, the combination of two joint members; rubber joints in said members, each comprising a rubber bushing in the member and a central pin in the bushing, one of the pins having a locking groove therein; shackle links connecting said pins, each having two sides and each side having joint receiving grooves receiving said pins; and a clamping bolt securing the halves together, the clamping bolt engaging the. walls of the grooved pin to lock the shackle on the pin.

9. In a shackle joint, the combination of two joint members having joint openings therein;

a-single joint in one opening comprising a bushing in the opening and a central extending pin in the bushing; a double joint in the other opening having a central bushing in the opening; an elongated pin in the central opening; rubber bushings on the ends of the elongated pin; and shackles engaging the ends of the extending pin and .the end bushings, said shackles each having clamping walls engaging the walls of the bushing and pin, and clamping bolts closing the walls of the shackle on the bushings and pin, said shackles being spaced from the walls of the opening.

11. In a shackle joint, the combination of two joint members having joint 099111 85 therein; a single joint in one opening comprising a bushing in the opening and a central extending pin in the bushing; adouble joint in the other opening having a central bushing in the open- 1 8; an rubber bushings on 'the ends of the elongated pin; and shackles en aging the ends oi the extending pin and the end bushings, said shackles having oil-set sleeve extensions engaging the bushings.

12. In ashackle device the combination of two joint members one of, which is flexible, shackles connecting said members having an gular movement relative to said members, rubber joints between the shackles and the members, the rubber joints being locked with the shackles and the members and accommodating the movement of the joints through distortion oi the rubber, the joint between the flexible member and the shackles having the greater elongated pin, in" the central opening;

angular movement, the rubber of the respective joints being so relatively disposed and arranged that in the operation of the device the rubber or the joint between the flexible member and the shackles will produce a less distortion of the rubber-per unit of angular movement.

13. Ina shackle device the combination of two joint members, shackles connecting said members having angular movement relative to said members, rubber joints between the shackles and the members, the rubber of the joints being locked with the shackles and the members and accommodating the movement of the joints through distortion of the rubber, one or said members being capable of greater angular movement relativeto said shackles than the other oi said members, the rubber of said joints being so relatively disposed and arranged that in the operation ofthe device to support a load, the rubber of the joint between the member having the/greater angular movement and the shackles will produce a less distortion of the rubber per unit of angular movement.

noon 0, LORD. 

